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Advancing NMR for Food Analysis and Authentication: Olive Oil, Avocado Oil and Table Olives as Case Studies- [electronic resource]
Advancing NMR for Food Analysis and Authentication: Olive Oil, Avocado Oil and Table Olives as Case Studies- [electronic resource]
상세정보
- 자료유형
- 학위논문파일 국외
- 최종처리일시
- 20240214101943
- ISBN
- 9798380370400
- DDC
- 641
- 저자명
- Tang, Fenfen.
- 서명/저자
- Advancing NMR for Food Analysis and Authentication: Olive Oil, Avocado Oil and Table Olives as Case Studies - [electronic resource]
- 발행사항
- [S.l.]: : The Ohio State University., 2023
- 발행사항
- Ann Arbor : : ProQuest Dissertations & Theses,, 2023
- 형태사항
- 1 online resource(209 p.)
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
- 주기사항
- Advisor: Hatzakis, Emmanuel.
- 학위논문주기
- Thesis (Ph.D.)--The Ohio State University, 2023.
- 사용제한주기
- This item must not be sold to any third party vendors.
- 사용제한주기
- This item must not be added to any third party search indexes.
- 초록/해제
- 요약Food fraud is a serious old issue that not only causes economic loss, but also has potential risks on consumers' health and safety. Food fraud incidents can also damage food industry and lead to drops in retail sales and stock prices. The increased international trade and complexities in the global supply chain have increased the risk of food fraud. Various actions have been made by government agencies, law enforcement and global initiatives to control food fraud. In addition, a variety of analytical methods have been developed and applied to ensure food quality and authenticity, such as molecular biology methods, chromatography methods, spectroscopic methods and isotopic/elemental methods. However, they all have their own limitations and with adulteration methods evolving to be more innovative and sophisticated, advanced and powerful analytical methods are needed to stay one step ahead. Nuclear Magnetic Resonance spectroscopy (NMR) is a versatile technology added to the food analysis and evaluation toolbox and can be complementary to other traditionally used methods. It has many advantages. It has high reproducibility and high-throughput, and provides quantitative results and information at molecular level. Besides, it requires minimum to no sample preparation and can be non-destructive under certain conditions. Furthermore, NMR-based untargeted analysis, which involves the combination of NMR with chemometrics, allows more diverse applications in food science. Despite its strengths, NMR is still an underutilized tool in food industry due to several limitations such as the high cost for initial purchasing and maintenance of the instrumentation, the severe peak overlapping, especially for 1D 1H spectra, and the time-consuming spectral processing that also may introduce external variances. Innovative NMR techniques or tools that have been developed in the past decade, have the potential to address these limitations. For example, the benchtop low-field NMR spectroscopy instruments are more affordable, and their functions and performance have been significantly improved. In addition, alternative approaches, such as tools for Bayesian analysis, are now available to extract important spectral parameters from the time domain raw NMR data, instead of using the conventional Fourier transformation, without spectral pre-processing steps such as phase and baseline corrections. In this research, olive oil, avocado oil and table olives have been used as case studies, to assess the potential of those traditional and innovative NMR analysis approaches. The selected food products have high nutritional and commercial values, while often become subject of adulteration. Specific cultivars are usually used for table olive and olive oil production because it is one of the most important factors that determines the composition, flavor, and nutritional value of final products. Thus, the authenticity of cultivar is of great interest and importance. Varietal origin is less of a concern for avocado oil due to the facts that it is often produced from avocados rejected from fresh food trade, and 'Hass' cultivar accounts for 80% of cultivated avocados globally. However, there are reports of avocado oil being adulterated by cheaper edible oils. To summarize, the overall objective of my dissertation was to evaluate NMR spectroscopy and innovative NMR technologies as tools for food analysis and authentication using targeted and untargeted approaches. The specific aims were: 1) To determine the fatty acid composition in olive oil using high-field NMR, differentiate olive cultivars using an untargeted NMR approach and compare the results with those obtained by GC-FID and UHPC-CAD. 2) To determine the fatty acid composition in avocado oils and differentiate avocado oils from other vegetable oils using high-field and low-field NMR. 3) To use NMR combined with Bayesian analysis through CRAFT to differentiate cultivars of table olive fruits, and compare the performance with the conventional Fourier transformation approach. The results showed that high-field NMR is an efficient tool for determining fatty acid composition in olive oil, whereas NMR combined with statistical analysis successfully differentiated between four olive oil cultivars. Although there was a good separation between Koroneiki, Arbosana and Arbequina/Sikitita, the differentiation between Sikitita and Arbequina was more challenging. This could be related to the fact that Sikitita is a hybrid between Picual and Arbequina. High-field NMR allowed the rapid identification of various compounds or classes of compounds in avocado oil and successfully distinguished avocado oil from high oleic sunflower oil, high oleic safflower oil, canola and soybean oils. Despite the relatively harder differentiation between avocado oil and olive oil due to similar fatty acid composition, pairwise classification model still allowed good separation between them. Low-field NMR demonstrated its potential for the fatty acid compositional analysis of avocado oil and showed good performance in the differentiation from other vegetable oils. However, it did have challenges with the identification of minor compounds and the differentiation between avocado oil and olive oil due to its limited resolution and sensitivity. Lastly, NMR combined with Bayesian analysis through CRAFT and chemometrics successfully classified four table olive cultivars, namely Manzanilla, Sevillano, Hojiblanca, and Gordal, and it had equivalent or even better performance compared to conventional Fourier transformation-based untargeted analysis. In conclusion, NMR spectroscopy is an efficient tool for the analysis and authentication of olive oil, avocado oil and table olives, and novel NMR approaches can be used to overcome several NMR limitations such as high cost, laborious data analysis and spectral overlapping. This research is setting an example of NMR as a useful tool for food analysis and combatting food fraud issues.
- 일반주제명
- Food science.
- 일반주제명
- Molecular biology.
- 일반주제명
- Nutrition.
- 키워드
- Food fraud
- 키워드
- Food industry
- 키워드
- Consumer health
- 키워드
- Consumer safety
- 기타저자
- The Ohio State University Food Science and Technology
- 기본자료저록
- Dissertations Abstracts International. 85-03B.
- 기본자료저록
- Dissertation Abstract International
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■1001 ▼aTang, Fenfen.
■24510▼aAdvancing NMR for Food Analysis and Authentication: Olive Oil, Avocado Oil and Table Olives as Case Studies▼h[electronic resource]
■260 ▼a[S.l.]:▼bThe Ohio State University. ▼c2023
■260 1▼aAnn Arbor :▼bProQuest Dissertations & Theses, ▼c2023
■300 ▼a1 online resource(209 p.)
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-03, Section: B.
■500 ▼aAdvisor: Hatzakis, Emmanuel.
■5021 ▼aThesis (Ph.D.)--The Ohio State University, 2023.
■506 ▼aThis item must not be sold to any third party vendors.
■506 ▼aThis item must not be added to any third party search indexes.
■520 ▼aFood fraud is a serious old issue that not only causes economic loss, but also has potential risks on consumers' health and safety. Food fraud incidents can also damage food industry and lead to drops in retail sales and stock prices. The increased international trade and complexities in the global supply chain have increased the risk of food fraud. Various actions have been made by government agencies, law enforcement and global initiatives to control food fraud. In addition, a variety of analytical methods have been developed and applied to ensure food quality and authenticity, such as molecular biology methods, chromatography methods, spectroscopic methods and isotopic/elemental methods. However, they all have their own limitations and with adulteration methods evolving to be more innovative and sophisticated, advanced and powerful analytical methods are needed to stay one step ahead. Nuclear Magnetic Resonance spectroscopy (NMR) is a versatile technology added to the food analysis and evaluation toolbox and can be complementary to other traditionally used methods. It has many advantages. It has high reproducibility and high-throughput, and provides quantitative results and information at molecular level. Besides, it requires minimum to no sample preparation and can be non-destructive under certain conditions. Furthermore, NMR-based untargeted analysis, which involves the combination of NMR with chemometrics, allows more diverse applications in food science. Despite its strengths, NMR is still an underutilized tool in food industry due to several limitations such as the high cost for initial purchasing and maintenance of the instrumentation, the severe peak overlapping, especially for 1D 1H spectra, and the time-consuming spectral processing that also may introduce external variances. Innovative NMR techniques or tools that have been developed in the past decade, have the potential to address these limitations. For example, the benchtop low-field NMR spectroscopy instruments are more affordable, and their functions and performance have been significantly improved. In addition, alternative approaches, such as tools for Bayesian analysis, are now available to extract important spectral parameters from the time domain raw NMR data, instead of using the conventional Fourier transformation, without spectral pre-processing steps such as phase and baseline corrections. In this research, olive oil, avocado oil and table olives have been used as case studies, to assess the potential of those traditional and innovative NMR analysis approaches. The selected food products have high nutritional and commercial values, while often become subject of adulteration. Specific cultivars are usually used for table olive and olive oil production because it is one of the most important factors that determines the composition, flavor, and nutritional value of final products. Thus, the authenticity of cultivar is of great interest and importance. Varietal origin is less of a concern for avocado oil due to the facts that it is often produced from avocados rejected from fresh food trade, and 'Hass' cultivar accounts for 80% of cultivated avocados globally. However, there are reports of avocado oil being adulterated by cheaper edible oils. To summarize, the overall objective of my dissertation was to evaluate NMR spectroscopy and innovative NMR technologies as tools for food analysis and authentication using targeted and untargeted approaches. The specific aims were: 1) To determine the fatty acid composition in olive oil using high-field NMR, differentiate olive cultivars using an untargeted NMR approach and compare the results with those obtained by GC-FID and UHPC-CAD. 2) To determine the fatty acid composition in avocado oils and differentiate avocado oils from other vegetable oils using high-field and low-field NMR. 3) To use NMR combined with Bayesian analysis through CRAFT to differentiate cultivars of table olive fruits, and compare the performance with the conventional Fourier transformation approach. The results showed that high-field NMR is an efficient tool for determining fatty acid composition in olive oil, whereas NMR combined with statistical analysis successfully differentiated between four olive oil cultivars. Although there was a good separation between Koroneiki, Arbosana and Arbequina/Sikitita, the differentiation between Sikitita and Arbequina was more challenging. This could be related to the fact that Sikitita is a hybrid between Picual and Arbequina. High-field NMR allowed the rapid identification of various compounds or classes of compounds in avocado oil and successfully distinguished avocado oil from high oleic sunflower oil, high oleic safflower oil, canola and soybean oils. Despite the relatively harder differentiation between avocado oil and olive oil due to similar fatty acid composition, pairwise classification model still allowed good separation between them. Low-field NMR demonstrated its potential for the fatty acid compositional analysis of avocado oil and showed good performance in the differentiation from other vegetable oils. However, it did have challenges with the identification of minor compounds and the differentiation between avocado oil and olive oil due to its limited resolution and sensitivity. Lastly, NMR combined with Bayesian analysis through CRAFT and chemometrics successfully classified four table olive cultivars, namely Manzanilla, Sevillano, Hojiblanca, and Gordal, and it had equivalent or even better performance compared to conventional Fourier transformation-based untargeted analysis. In conclusion, NMR spectroscopy is an efficient tool for the analysis and authentication of olive oil, avocado oil and table olives, and novel NMR approaches can be used to overcome several NMR limitations such as high cost, laborious data analysis and spectral overlapping. This research is setting an example of NMR as a useful tool for food analysis and combatting food fraud issues.
■590 ▼aSchool code: 0168.
■650 4▼aFood science.
■650 4▼aMolecular biology.
■650 4▼aNutrition.
■653 ▼aFood fraud
■653 ▼aFood industry
■653 ▼aConsumer health
■653 ▼aConsumer safety
■653 ▼aGlobal supply chain
■690 ▼a0359
■690 ▼a0307
■690 ▼a0570
■71020▼aThe Ohio State University▼bFood Science and Technology.
■7730 ▼tDissertations Abstracts International▼g85-03B.
■773 ▼tDissertation Abstract International
■790 ▼a0168
■791 ▼aPh.D.
■792 ▼a2023
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16935521▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
■980 ▼a202402▼f2024


